Il17rb-eGFP marks all ILC2 irrespective of their distinct, tissue-specific coreceptor expression programs. (A) Representative flow cytometry plots showing Il17rb-eGFP expression in ILCs from the fetal gut at E18.5. (B) Flow cytometry plots depicting Il17rb-eGFP expression in Lineage⁻ cells from the fetal gut. (C) Flow cytometry plots of live CD45⁺Lineage⁻Il17rb-eGFP⁺ cells in the SI and BM of 12-wk-old adult mice. (D) Representative flow cytometry plots of ILC2s in adult Peyer’s patches. (E and F) Flow cytometry plots of ILC2s in the lungs of Il17rb-CreERT2-eGFP mice. (G) Flow cytometry plots of ILC2s in the adult skin, accompanied by representative histograms showing Il17rb-eGFP and IL-25R expression. (H) Flow cytometry plots of ILC2s in the muscle with a representative histogram of Il17rb-eGFP expression. Data from all panels are representative of three or more independent experiments.